Association analysis for yield and yield contributing traits of potato (Solanum tuberosum L.)

Abstract

To understand interrelationships among different yield and yield attributing traits in potato (Solanum tuberosum L.) an experiment was conducted using twenty potato genotypes including 2 checks namely Khufri Pukhraj and Kufri Chipsona 1. The observations were recorded on eighteen traits. Correlation coefficient analysis revealed that total tuber yield plot-1 was showed highly and significantly positive correlated with specific gravity, number of shoots plant-1, dry matter content of shoots, unmarketable tuber weight plant-1 and starch content at genotypic level. However, it had exhibited highly significant positive association with number of branches plant-1 at genotypic and phenotypic level respectively. Thus direct selection for above traits will be effective and helpful in improving total tuber yield. Path coefficient analysis unveil that total tuber yield plot-1 was found high positive and direct effect for the traits plant emergence %, number of branches plant-1, number of shoots plant-1, dry matter content of shoots, tuber weight plant-1, marketable tuber weight plant-1, unmarketable tuber weight plant-1, harvest index and specific gravity. So these traits would be most suitable for direct selection and improvement of potato genotypes for tuber yield.